Table 2.
Frequency of truck traffic and symptoms of rhinitis ever, current rhinitis, current rhinoconjunctivitis and hayfever along with crude and adjusted odd ratios
| Frequency of trucks passing near homes on weekdays | Totale | (%) | Crude OR (95 % CI) | P | Adjusted OR (95 % CI) | P |
|---|---|---|---|---|---|---|
| Rhinitis evera | ||||||
| Never | 563 | 47.3 | 1 | 1 | ||
| Seldom | 1033 | 53.1 | 1.26 (1.02–1.55) | 0.027 | 1.16 (0.92–1.56) | 0.197 |
| Frequently through the day | 580 | 49.3 | 1.09 (0.86–1.37) | 0.451 | 1.03 (0.79–1.34) | 0.791 |
| Almost all day | 1212 | 55.9 | 1.43 (1.16–1.75) | 0.001 | 1.46 (1.16–1.84) | 0.001 |
| Current rhinitisb | ||||||
| Never | 563 | 34.6 | 1 | 1 | ||
| Seldom | 1033 | 41.2 | 1.25 (1.01–1.55) | 0.038 | 1.30 (0.99–1.62) | 0.059 |
| Frequently through the day | 580 | 39.1 | 1.23 (0.97–1.57) | 0.081 | 1.25 (0.95–1.64) | 0.102 |
| Almost all day | 1212 | 42.5 | 1.46 (1.88–1.81) | 0.000 | 1.60 (1.24–2.02) | 0.000 |
| Current rhinoconjunctivitisc | ||||||
| Never | 563 | 18.8 | 1 | 1 | ||
| Seldom | 1033 | 23.0 | 1.23 (0.95–1.59) | 0.113 | 1.17 (0.89–1.54) | 0.234 |
| Frequently through the day | 580 | 19.0 | 1.01 (0.75–1.37) | 0.904 | 0.96 (0.70–1.30) | 0.799 |
| Almost all day | 1212 | 25.7 | 1.54 (1.20–1.97) | 0.001 | 1.42 (1.09–1.84) | 0.008 |
| Hayfeverd | ||||||
| Never | 563 | 32.7 | 1 | 1 | ||
| Seldom | 1033 | 38.7 | 1.22 (0.98–1.51) | 0.074 | 1.12 (0.87–1.43) | 0.362 |
| Frequently through the day | 580 | 37.9 | 1.28 (1.00–1.63) | 0.047 | 1.19 (0.90–1.57) | 0.203 |
| Almost all day | 1212 | 38.2 | 1.34 (1.08–1.66) | 0.007 | 1.23 (0.96–1.57) | 0.087 |
a, bModel adjusted for the folowing v mode of transport to school, being born in the area, vigorous physical activity, ETS exposure at home in the past 30 days, residential fuel heating type most frequently used at home
cModel adjusted for mode of transport to school, being born in the area, vigorous physical activity, hours watching TV during normal week, residential heating fuel type most frequently used at home
dModel adjusted for vigorous physical activity, residential fuel heating type most frequently used at home, ETS exposure at home
eTotals for each risk factor are different due to difference in missing values